Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ABC91F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N859DN · BOEING 737-900 · operated by BANK OF UTAH TRUSTEE

Hex
ABC91F
Octal
52744437
Decimal
11,258,143
Country
US
Tail
N859DN
Type
B739
No current signal · last broadcast 2h ago
Flights observed
494
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ABC91F.

Country allocation

The ICAO 24-bit address ABC91F falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
DAL1147 Delta Air Lines 9 2026-06-09
DAL2211 - 8 2026-07-13
DAL2951 - 6 2026-07-08
DAL2070 Delta Air Lines 6 2026-04-18
DAL874 - 5 2026-07-03
DAL866 Delta Air Lines 5 2026-04-15
DAL801 - 5 2026-06-29
DAL3128 - 5 2026-07-10
DAL3109 Delta Air Lines 5 2026-06-09
DAL1947 Delta Air Lines 5 2026-06-02
DAL1816 - 5 2026-07-11
DAL1500 - 5 2026-07-12
DAL1013 - 5 2026-06-28
DAL851 Delta Air Lines 4 2026-04-30
DAL809 Delta Air Lines 4 2026-05-26
DAL517 Delta Air Lines 4 2026-06-08
DAL3169 - 4 2026-06-18
DAL3157 - 4 2026-06-29
DAL2999 Delta Air Lines 4 2026-06-02
DAL2925 - 4 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1199 ATL → ORD Jul 14, 03:41 UTCJul 14, 05:06 UTC1h 25m
2026-07-14 DAL1199 ATL → ORD Jul 14, 03:40 UTCJul 14, 05:05 UTC1h 25m
2026-07-13 DAL2211 - Jul 13, 23:40 UTCJul 14, 00:25 UTC45m
2026-07-13 DAL2211 PNS → ATL Jul 13, 23:40 UTCJul 14, 00:30 UTC50m
2026-07-13 DAL2211 ATL → PNS Jul 13, 21:20 UTCJul 13, 22:10 UTC50m
2026-07-13 DAL640 - Jul 13, 14:55 UTCJul 13, 19:55 UTC5h 0m
2026-07-13 DAL656 ATL → SFO Jul 13, 03:40 UTCJul 13, 07:45 UTC4h 5m
2026-07-13 DAL2211 - Jul 13, 01:05 UTCJul 13, 01:50 UTC45m
2026-07-12 DAL2211 - Jul 12, 22:05 UTCJul 12, 22:55 UTC50m
2026-07-12 DAL1273 - Jul 12, 19:55 UTCJul 12, 20:25 UTC30m
2026-07-12 DAL1273 - Jul 12, 17:20 UTCJul 12, 17:50 UTC30m
2026-07-12 DAL1500 - Jul 12, 14:25 UTCJul 12, 15:40 UTC1h 15m
2026-07-12 DAL1500 CLE → ATL Jul 12, 14:21 UTCJul 12, 15:48 UTC1h 27m
2026-07-12 DAL1500 ATL → CLE Jul 12, 11:30 UTCJul 12, 12:45 UTC1h 15m
2026-07-11 DAL1816 PVR → ATL Jul 11, 20:51 UTCJul 12, 00:22 UTC3h 31m
2026-07-11 DAL1816 ATL → ATL Jul 11, 14:50 UTCJul 12, 00:20 UTC9h 30m
2026-07-11 DAL1499 - Jul 11, 11:55 UTCJul 11, 13:10 UTC1h 15m
2026-07-11 DAL1057 ATL → SRQ Jul 11, 02:05 UTCJul 11, 03:10 UTC1h 5m
2026-07-10 DAL1196 RSW → ATL Jul 10, 22:40 UTCJul 11, 00:05 UTC1h 25m
2026-07-10 DAL1196 RSW → ATL Jul 10, 22:37 UTCJul 11, 00:03 UTC1h 26m
2026-07-10 DAL1196 ATL → RSW Jul 10, 17:15 UTCJul 10, 18:40 UTC1h 25m
2026-07-10 DAL3128 MSY → ATL Jul 10, 14:25 UTCJul 10, 15:25 UTC1h 0m
2026-07-10 DAL3128 MSY → ATL Jul 10, 14:20 UTCJul 10, 15:27 UTC1h 7m
2026-07-10 DAL3128 ATL → MSY Jul 10, 12:00 UTCJul 10, 13:05 UTC1h 5m
2026-07-10 DAL1346 ORF → ATL Jul 10, 02:25 UTCJul 10, 03:50 UTC1h 25m
2026-07-09 DAL1346 ATL → ORF Jul 9, 23:35 UTCJul 10, 00:45 UTC1h 10m
2026-07-09 DAL1273 - Jul 9, 21:30 UTCJul 9, 22:00 UTC30m
2026-07-09 DAL1273 - Jul 9, 17:15 UTCJul 9, 17:50 UTC35m
2026-07-09 DAL1688 ABQ → ATL Jul 9, 13:10 UTCJul 9, 15:50 UTC2h 40m
2026-07-09 DAL1531 ATL → ABQ Jul 9, 01:00 UTCJul 9, 03:35 UTC2h 35m
2026-07-08 DAL1008 - Jul 8, 22:00 UTCJul 8, 23:05 UTC1h 5m
2026-07-08 DAL1008 - Jul 8, 19:30 UTCJul 8, 20:20 UTC50m
2026-07-08 DAL2951 - Jul 8, 15:50 UTCJul 8, 17:50 UTC2h 0m
2026-07-08 DAL2951 ATL → BDL Jul 8, 12:20 UTCJul 8, 14:15 UTC1h 55m
2026-07-08 DAL3038 - Jul 8, 10:00 UTCJul 8, 10:35 UTC35m
2026-07-08 DAL3029 - Jul 8, 02:45 UTCJul 8, 03:20 UTC35m
2026-07-08 DAL3029 ATL → CAE Jul 8, 02:43 UTCJul 8, 03:19 UTC36m
2026-07-07 DAL2211 - Jul 7, 23:30 UTCJul 8, 00:15 UTC45m
2026-07-07 DAL2211 PNS → ATL Jul 7, 23:26 UTCJul 8, 00:14 UTC48m
2026-07-07 DAL2211 ATL → PNS Jul 7, 20:55 UTCJul 7, 21:45 UTC50m
2026-07-07 DAL1359 PBI → LGA Jul 7, 18:45 UTCJul 7, 19:30 UTC45m
2026-07-07 DAL1359 PBI → LGA Jul 7, 16:40 UTCJul 7, 17:30 UTC50m
2026-07-07 DAL2634 - Jul 7, 14:15 UTCJul 7, 15:10 UTC55m
2026-07-07 DAL2634 ATL → RDU Jul 7, 11:35 UTCJul 7, 12:35 UTC1h 0m
2026-07-07 DAL3115 SRQ → ATL Jul 7, 02:40 UTCJul 7, 03:50 UTC1h 10m
2026-07-06 DAL3115 ATL → SRQ Jul 6, 21:30 UTCJul 6, 22:45 UTC1h 15m
2026-07-06 DAL2710 YYZ → ATL Jul 6, 18:05 UTCJul 6, 19:50 UTC1h 45m
2026-07-06 DAL2710 YYZ → ATL Jul 6, 18:01 UTCJul 6, 19:50 UTC1h 49m
2026-07-06 DAL2883 ATL → YYZ Jul 6, 14:20 UTCJul 6, 16:00 UTC1h 40m
2026-07-06 DAL2579 - Jul 6, 11:10 UTCJul 6, 12:30 UTC1h 20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N859DN page for operator, model, and routing details .

Mode-S ABC91F frequently asked

What is Mode-S code ABC91F?
ABC91F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N859DN.
Where is Mode-S ABC91F registered?
Mode-S code ABC91F is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is ABC91F broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC91F, octal 52744437, decimal 11,258,143.
What flights does ABC91F operate?
Mode-S ABC91F has broadcast 20 distinct callsigns, including DAL1147, DAL2211, DAL2951, DAL2070, DAL874.